What sector is going to boom in the next few years?

Ans: Hi Sivaramakrishnan,

Congratulations on having an active working life at the age of 80.

For your monthly expenses of Rs 50000 and assuming an inflation of 7% over the next 15 years, you require approx. Rs 85 lakhs (today).

You already have Rs 182 lakhs (not including any further savings over the next 6 months) invested across MF/ FD/ and STOCKS.

I recommend you have a systematic withdrawal plan from your investments for your annual expenses.
Depending on how you have spread your investments, you can decide on the approach.
For MFs - its simple to do a SWP for an amount each month.
For FDs - you may need to liquidate them, so instead of breaking them, plan to use them at their maturity if its within six months of your requirement. if the maturity is long term, and you have a need then you may need to liquidate. Also check if there is an option to make them Sweep-in type FD, which means that when your account has less balance, it will move money from FD to account. Discuss with your bank on options available to you.
For Stocks - You can decide when to liquidate them. If you wish to move away from stocks, then you can consider investing in so hybrid Mutual fund schemes considering your time horizon.

Overall you will be looking to grow approx. Rs 1 crore over the next 15 years and this can grow to an amount of Rs 3 crores at 8% returns.

So your current corpus is more than sufficient and even if you increase your monthly expenses, you will have a surplus after 15 years.
Happy retirement and a healthy life ahead.

Thanks & Regards
Janak Patel
Certified Financial Planner.